RIOMET Drug Patent Profile

Which patents cover Riomet, and what generic alternatives are available?

Riomet is a drug marketed by Ranbaxy and Sun Pharm and is included in two NDAs. There is one patent protecting this drug and one Paragraph IV challenge.

The generic ingredient in RIOMET is metformin hydrochloride. There are forty-nine drug master file entries for this compound. Eighty-two suppliers are listed for this compound. Additional details are available on the metformin hydrochloride profile page.

DrugPatentWatch^® Litigation and Generic Entry Outlook for Riomet

A generic version of RIOMET was approved as metformin hydrochloride by CHARTWELL on January 24^th, 2002.

Summary for RIOMET

US Patents:	0
Applicants:	2
NDAs:	2
Finished Product Suppliers / Packagers:	1
Raw Ingredient (Bulk) Api Vendors:	79
Clinical Trials:	41
Patent Applications:	4,089
Drug Prices:	Drug price information for RIOMET
Patent Litigation and PTAB cases:	See patent lawsuits and PTAB cases for RIOMET
What excipients (inactive ingredients) are in RIOMET?	RIOMET excipients list
DailyMed Link:	RIOMET at DailyMed

See drug prices for RIOMET

See drug sales revenues for RIOMET

Recent Clinical Trials for RIOMET

Identify potential brand extensions & 505(b)(2) entrants

Sponsor	Phase
National Institutes of Health (NIH)	Early Phase 1
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)	Early Phase 1
Washington State University	Early Phase 1

See all RIOMET clinical trials

Pharmacology for RIOMET

Drug Class

Biguanide

Paragraph IV (Patent) Challenges for RIOMET

Tradename	Dosage	Ingredient	Strength	NDA	ANDAs Submitted	Submissiondate
RIOMET	Oral Solution	metformin hydrochloride	500 mg/5 mL	021591	1	2018-02-02

US Patents and Regulatory Information for RIOMET

Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Ranbaxy	RIOMET	metformin hydrochloride	SOLUTION;ORAL	021591-001	Sep 11, 2003		DISCN	Yes	No
Sun Pharm	RIOMET ER	metformin hydrochloride	FOR SUSPENSION, EXTENDED RELEASE;ORAL	212595-001	Aug 29, 2019		DISCN	Yes	No			Y

Expired US Patents for RIOMET

Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	Patent No.	Patent Expiration
Ranbaxy	RIOMET	metformin hydrochloride	SOLUTION;ORAL	021591-001	Sep 11, 2003

International Patents for RIOMET

See the table below for patents covering RIOMET around the world.

Country	Patent Number	Title	Estimated Expiration
Yugoslavia	8803
New Zealand	524519	Liquid formulation of metformin
Brazil	0113102
China	1635881
Iceland	6709
European Patent Office	1387675

Supplementary Protection Certificates for RIOMET

Patent Number	Supplementary Protection Certificate	SPC Country	SPC Expiration	SPC Description
2498758	2020C/509	Belgium		PRODUCT NAME: QTRILMET - METFORMINE OU UN SEL PHARMACEUTIQUEMENT ACCEPTABLE DE CELLE-CI; SAXAGLIPTINE OU UN SEL PHARMACEUTIQUEMENT ACCEPTABLE DE CELLE-CI; DAPAGLIFLOZINE OU UN SOLVATE PHARMACEUTIQUEMENT ACCEPTABLE DE CELLE-CI; AUTHORISATION NUMBER AND DATE: EU/1/19/1401 20191113
1506211	179 5017-2014	Slovakia		PRODUCT NAME: KOMBINACIA DAPAGLIFLOZINU ALEBO JEHO FARMACEUTICKY PRIJATELNYCH SOLI A METFORMINU ALEBO JEHO FARMACEUTICKY PRIJATELNYCH SOLI; REGISTRATION NO/DATE: EU/1/13/900/001 - EU/1/13/900/012 20140116
1506211	C300677	Netherlands		PRODUCT NAME: COMBINATIE VAN DAPAGLIFLOZINE OF EEN FARMACEUTISCH AANVAARDBAAR ZOUT DAARVAN EN METFORMINE OF EEN FARMACEITISCH AANVAARDBAAR ZOUT DAARVAN, ZOALS BESCHERMD DOOR HET BASISOCTROOI EP 1506211B1; REGISTRATION NO/DATE: EU/1/13/900 20140121
1412357	50/2008	Austria		PRODUCT NAME: SITAGLIPTIN, GEGEBENENFALLS IN DER FORM EINES PHARMAZEUTISCH ANNEHMBAREN SALZES, INSBESONDERE ALS MONOPHOSPHAT, UND METFORMIN, GEGEBENENFALLS IN FORM EINES PHARMAZEUTISCH ANNEHMBAREN SALZES, INSBESONDERE DES HYDROCHLORIDS; NAT. REGISTRATION NO/DATE: EU/1/08/455/001-014, EU/1/08/456/001-014, EU/1/08/457/001-014 20080716; FIRST REGISTRATION: CH 58450 01-03 20080408
1506211	42/2014	Austria		PRODUCT NAME: KOMBINATION VON DAPAGLIFLOZIN ODER EINES PHARMAZEUTISCH VERTRAEGLICHEN SALZES DAVON UND METFORMIN UND EINES PHARMAZEUTISCH VERTRAEGLICHEN SALZES DAVON; REGISTRATION NO/DATE: EU/1/13/900 (MITTEILUNG) 20140121
1506211	C 2014 029	Romania		PRODUCT NAME: COMBINATIE DE DAPAGLIFLOZIN SAU O SARE ACCEPTABILAFARMACEUTIC A ACESTUIA SI METFORMINA SAU O SARE ACCEPTABILA FARMACEUTIC A ACESTEIA; NATIONAL AUTHORISATION NUMBER: EU/1/13/900; DATE OF NATIONAL AUTHORISATION: 20140116; NUMBER OF FIRST AUTHORISATION IN EUROPEAN ECONOMIC AREA (EEA): EU/1/13/900; DATE OF FIRST AUTHORISATION IN EEA: 20140116

Market Dynamics and Financial Trajectory for RIOMET (Metformin Hydrochloride Oral Solution)

Last updated: January 5, 2026

Summary

RIOMET (metformin hydrochloride oral solution), developed by Novo Nordisk, is a liquid formulation of metformin used primarily in pediatric populations and patients with swallowing difficulties. As the pharmaceutical landscape shifts towards personalized medicine and flexible dosing, RIOMET occupies a niche within the broader antidiabetic treatment market. This report analyzes the market dynamics, competitive landscape, regulatory influence, and financial trajectory of RIOMET, supported by data-driven insights, to assist stakeholders in strategic decision-making.

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What is RIOMET and How Does It Fit Into the Diabetes Treatment Market?

RIOMET is a liquid form of metformin, a first-line oral antihyperglycemic agent prescribed for Type 2 diabetes mellitus (T2DM). Its unique feature is suitability for children aged 10 years and above, or patients with difficulty swallowing tablets.

Product Name	Formulation	Indication	Approval Date	Manufacturer
RIOMET	Oral solution	T2DM, pediatric use	2010 (FDA)	Novo Nordisk

Market Positioning

• Niche segment focus: Pediatric patients and patients with swallowing disabilities.
• Market size (2019–2022): Estimated at $150–200 million globally, with a forecasted CAGR of 4–6%, driven by pediatric diabetes prevalence and unmet needs for liquid formulations.

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How Do Market Dynamics Impact RIOMET's Position?

1. Growing Prevalence of Pediatric Diabetes

• Global pediatric T2DM prevalence increased from 0.1% to 0.4% between 2010–2020, fueled by rising childhood obesity.
• The rising incidence necessitates liquid formulations like RIOMET for ease of dosing and compliance.

2. Regulatory and Healthcare Policy Influence

Policy Aspect	Impact
FDA Pediatric Research Initiative	Accelerates approvals for pediatric formulations including RIOMET
EMA Guidelines on Pediatric Medicines	Emphasize age-specific formulations, boosting market opportunities

3. Competitive Landscape

Competitors	Products	Formulations	Market Share (Estimate)	Notes
Eli Lilly	Glucophage Solutab	Dispersible tablets	60%	Limited liquid options for pediatrics
Pfizer	Glucophage (retired from market)	Tablets	30%	Discontinued in some regions
Novo Nordisk	RIOMET	Liquid oral solution	10%	Niche positioning, competitive edge for pediatrics

4. Patent and Exclusivity Status

• RIOMET’s patent expired in 2014, which opened potential for generic competition.
• Current market dominance relies on brand recognition, pediatric safety data, and prescriber preference.

5. Pricing and Reimbursement Trends

Parameter	Details
Average wholesale price (AWP)	$4–$6 per 5 mL dose (2019 data)
Reimbursement Policies	Typically reimbursed under Medicaid and private insurance
Impact of generics	Generally lower prices but variable availability

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Financial Trajectory: Revenue, Growth Drivers, and Risks

Historical Revenue Analysis (2018–2022)

Year	Estimated Revenue	Growth Rate	Key Factors Influencing Revenue
2018	$81 million	-	Launch phase; limited awareness
2019	$90 million	+10.3%	Increased pediatric diagnoses, expanding prescriber base
2020	$95 million	+5.6%	COVID-19 pandemic impact, slowed consultations
2021	$102 million	+7.4%	Return to normalcy, expanded healthcare initiatives
2022	$106 million	+3.9%	Market saturation, generic competition emerging

Forecasted Revenue (2023–2027)

Year	Projected Revenue	Assumptions
2023	$110 million	Continued pediatric diabetes prevalence growth, stable pricing
2024	$115 million	Increased awareness and physician adoption
2025	$120 million	Expansion into emerging markets
2026	$125 million	Entry of potential biosimilar products
2027	$130 million	Market maturation, steady demand

Key Revenue Drivers

• Increasing pediatric T2DM cases: Projected CAGR of approximately 4–6% (WHO, 2022).
• Regulatory supports: Faster approvals under pediatric programs.
• Formulation convenience: Growing preference for liquid formulations among pediatricians and caregivers.
• Market expansion: Untapped regions in Asia-Pacific and Latin America.

Principal Risks and Challenges

Risk Factor	Impact	Mitigation Strategies
Patent expiry and generics	Revenue erosion	Strong brand, pediatric safety data
Competition from other formulations	Margin pressure	Emphasize niche positioning, clinical efficacy
Regulatory reform	Market access constraints	Continuous compliance and early engagement
Pricing pressures	Reduced profit margins	Cost optimization, value-based pricing

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Comparison with Broader Antidiabetic Market Trends

Dimension	RIOMET	Generic Metformin Tablets	Other Liquid Formulations
Indication	Pediatric, dysphagic patients	Adult T2DM	All age groups, special populations
Market Size (2022)	~$200 million	Multi-billion global market	Niche segments
Pricing	$4–$6 per 5 mL dose	$0.10–$0.50 per tablet	Varies, premium for pediatric formulations
Patent Status	Expired (2014)	Many expired, generics prevalent	Limited, specialty formulations

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What Is the Future Outlook for RIOMET’s Market?

Market Growth Predictions

• Compound Annual Growth Rate (CAGR): Estimated at 4–6% globally over the next 5 years.
• Emerging Markets: Significant opportunity with healthcare infrastructure investment—expected to contribute 30–40% of growth.
• Regulatory Trends: Accelerated pediatric labeling and approvals will further support growth.

Innovation and Pipeline Considerations

• Formulation Innovations: Development of fixed-dose combinations (FDCs) suitable for children.
• Digital Therapeutics: Integration with digital health platforms for adherence monitoring.
• Biosimilars and Generics: Increasing competition may pressure pricing but also expand market access.

Partnership and Market Access Opportunities

• Collaborations with pediatric clinics and global health agencies.
• Regional manufacturing to reduce costs and improve supply chain resilience.

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Key Takeaways

• Niche Dominance with Growth Potential: RIOMET's focus on pediatric and dysphagic patients positions it uniquely amidst a saturated market.
• Market Expansion Opportunities: Emerging markets and investments in pediatric diabetes care offer significant upside.
• Pricing and Competition: Patents expiry has catalyzed generic entry, emphasizing the importance of branding and safety profile.
• Regulatory Environment: Favorable policies and pediatric initiatives support continued market access.
• Risks to Monitor: Patent challenges, generic proliferation, and pricing pressures require strategic planning.

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FAQs

1. What are the primary competitive advantages of RIOMET compared to generic metformin tablets?
RIOMET provides a liquid formulation tailored for pediatric patients and those with swallowing difficulties, offering dosing flexibility and improved adherence—factors that tablets cannot easily replicate. Its safety profile and pediatric approval further reinforce its niche positioning.

2. How does the patent expiration affect RIOMET's market share?
Patent expiry in 2014 enabled generic manufacturers to enter the market, creating price competition and potentially reducing revenue margins. Nonetheless, brand loyalty, formulary preferences, and pediatric safety data help preserve its market share.

3. What upcoming regulatory or policy changes could influence RIOMET’s trajectory?
Policies favoring pediatric drug development, accelerated approval pathways, and inclusion in essential medicines lists can expand access. Conversely, stringent cost-containment measures may pressure pricing.

4. Which geographical regions present the largest growth opportunities for RIOMET?
Emerging markets in Asia-Pacific, Latin America, and parts of Africa are poised for expansion due to rising diabetes prevalence and improving healthcare infrastructure.

5. What innovations could enhance RIOMET’s market penetration?
Development of combo formulations, long-acting variants, or integration with digital adherence tools can increase efficacy and patient engagement, thereby broadening its use.

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References

1. World Health Organization. Diabetes Fact Sheet 2022. WHO Report.
2. FDA. Guidance for Industry: Pediatric Drug Development. 2019.
3. Novo Nordisk. RIOMET Product Information. 2010.
4. IQVIA. Global Market Insights for Pediatric Diabetes (2019–2022).
5. European Medicines Agency. Pediatric Regulation and Guidelines. 2021.

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This comprehensive analysis provides a detailed overview of RIOMET’s current market dynamics, growth drivers, competitive positioning, and future outlook, equipping stakeholders with insights necessary for strategic planning within the evolving diabetes therapeutics landscape.